java - 如何通过 JUnit 覆盖 block 捕获

Question

我想用 JUnit 覆盖此 try block 的 catch 部分。我该怎么做？

public class ClientCertSocketFactory implements SecureProtocolSocketFactory {
    private static final Logger LOGGER = LoggerFactory.getLogger(ClientCertSocketFactory.class);

    private SSLSocketFactory sslSocketFactory;

    public ClientCertSocketFactory() throws IOException{
        String trustStoreFilePath = System.getProperty("javax.net.ssl.trustStore");
        try {
            TrustManagerFactory trustManagerFactory = CertManagerFactory.loadTrustStore(trustStoreFilePath);
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, trustManagerFactory.getTrustManagers(), null);
            this.sslSocketFactory = sslContext.getSocketFactory();
        } catch (NoSuchAlgorithmException e) {
            LOGGER.error("No Provider supports a TrustManagerFactorySpi implementation for the TLS protocol. Error message: " + e);
        } catch (KeyManagementException e) {
            LOGGER.error("Error occurred when initializing SSLContext. Error message: " + e);
        }
    }
}

Answer 1

First of all, catching exceptions and doing nothing but logging them is a Code Smell. Read this article, for example.

话虽这么说，当您调用这些创建方法时，它也有一种代码气味:

• CertManagerFactory.loadTrustStore
• SSLContext.getInstance

在构造函数内部，而不是将它们传入。如果您要使用 Dependency Injection相反，您可以将这些对象传递到构造函数中，然后查看构造函数是否按您希望的方式工作。